20000109 has 8 divisors (see below), whose sum is σ = 28235520. Its totient is φ = 12549056.

The previous prime is 20000107. The next prime is 20000147. The reversal of 20000109 is 90100002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20000109 - 2¹ = 20000107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000094 and 20000103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196029 + ... + 196130.

It is an arithmetic number, because the mean of its divisors is an integer number (3529440).

Almost surely, 2^20000109 is an apocalyptic number.

It is an amenable number.

20000109 is a deficient number, since it is larger than the sum of its proper divisors (8235411).

20000109 is a wasteful number, since it uses less digits than its factorization.

20000109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392179.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 20000109 is about 4472.1481415535. The cubic root of 20000109 is about 271.4422547778.

The spelling of 20000109 in words is "twenty million, one hundred nine", and thus it is an aban number.